求助 ：如何制作无名块？
如何制作无名块？块中的实体要保留其属性，如赋有材质的话要保留。哪位知道的话，望能提供一点原代码，谢谢！！
此问题已解决，抄出来与大家分享一下。BlockName=“*U”即为无名块，设为其它值即为有名块。
void getUcsToWcsOriginMatrix(AcGeMatrix3d& m,const AcGePoint3d& wcsBasePt, AcDbDatabase* db,double angle)
{
ASSERT(db != NULL);
AcGeMatrix3d tmpMat;
if (acdbUcsMatrix(tmpMat, db))
{
AcGePoint3d origin;
AcGeVector3d xDir, yDir, zDir;
tmpMat.getCoordSystem(origin, xDir, yDir, zDir);
origin += wcsBasePt.asVector();
xDir.rotateBy(angle,zDir);
yDir.rotateBy(angle,zDir);
m.setToAlignCoordSys(origin, xDir, yDir, zDir,
AcGePoint3d::kOrigin, AcGeVector3d::kXAxis,
AcGeVector3d::kYAxis, AcGeVector3d::kZAxis);
}
else
{
ASSERT(0);
m = AcGeMatrix3d::kIdentity;
}
}
Acad::ErrorStatus cloneAndXformObjects(AcDbDatabase* db, AcDbObjectIdArray entsToClone,const AcDbObjectId& ownerBlockId,
const AcGeMatrix3d& xformMat)
{
ASSERT(db != NULL);
AcDbIdMapping idMap;
Acad::ErrorStatus es = db->deepCloneObjects(
const_cast(entsToClone),
const_cast(ownerBlockId), idMap);
if (es != Acad::eOk)
{
return es;
}
AcDbEntity* clonedEnt;
AcDbIdPair idPair;
AcDbIdMappingIter iter(idMap);
for (iter.start(); !iter.done(); iter.next())
{
if (!iter.getMap(idPair)) return Acad::eInvalidInput;
if (idPair.isCloned())
{
es = acdbOpenAcDbEntity(clonedEnt, idPair.value(), AcDb::kForWrite);
if (es == Acad::eOk)
{
if (idPair.isPrimary())
{
clonedEnt->transformBy(xformMat);
}
clonedEnt->close();
}
}
}
return Acad::eOk;
}
Acad::ErrorStatus defineNewAnonymousBlock(AcDbBlockTableRecord*& newBlkRec,AcDbObjectId& newBlkRecId, AcDbDatabase* db)
{
ASSERT(db != NULL);
AcDbBlockTable* blkTbl;
Acad::ErrorStatus es = db->getSymbolTable(blkTbl, AcDb::kForWrite);
if (es != Acad::eOk) return es;
newBlkRec = new AcDbBlockTableRecord;
newBlkRec->setPathName("");
es = newBlkRec->setName(_T("*U"));
if (es == Acad::eOk) es = blkTbl->add(newBlkRecId, newBlkRec);
if (es != Acad::eOk)
{
delete newBlkRec;
newBlkRec = NULL;
}
blkTbl->close();
return es;
}
AcDbObjectId fdm_MakeBlock(CString BlockName,AcDbObjectIdArray EntIdArray,const AcGePoint3d &BasePt,double angle,const AcGeScale3d &scale)
{
AcDbObjectId newBlkRecId;
AcDbBlockTableRecord* newBlkRec;
if (defineNewAnonymousBlock(newBlkRec, newBlkRecId, acdbHostApplicationServices()->workingDatabase()) == Acad::eOk)
{
newBlkRec->setName(BlockName);
newBlkRec->setOrigin(AcGePoint3d::kOrigin);
newBlkRec->close();
AcGeMatrix3d matrix;
getUcsToWcsOriginMatrix(matrix,BasePt,acdbCurDwg(),angle);
if (cloneAndXformObjects(acdbHostApplicationServices()->workingDatabase(), EntIdArray, newBlkRecId, matrix) == Acad::eOk)
{
AcDbObjectId ReferenceId=AcDbObjectId::kNull;
AcDbBlockReference *pReference=new AcDbBlockReference;
pReference->setBlockTableRecord(newBlkRecId);
pReference->setPosition(BasePt);
pReference->setRotation(angle);
pReference->setScaleFactors(scale);
if(fdm_addToModelSpace(ReferenceId,pReference)==Acad::eOk)
{
EraseEntity(EntIdArray);
pReference->close();
return ReferenceId;
}
}
}
return AcDbObjectId::kNull;
}
此问题已解决，抄出来与大家一起分享。 BlockName设为"*U"为无名块，设为其它值为有名块。
void getUcsToWcsOriginMatrix(AcGeMatrix3d& m,const AcGePoint3d& wcsBasePt, AcDbDatabase* db,double angle)
{
ASSERT(db != NULL);
AcGeMatrix3d tmpMat;
if (acdbUcsMatrix(tmpMat, db))
{
AcGePoint3d origin;
AcGeVector3d xDir, yDir, zDir;
tmpMat.getCoordSystem(origin, xDir, yDir, zDir);
origin += wcsBasePt.asVector();
xDir.rotateBy(angle,zDir);
yDir.rotateBy(angle,zDir);
m.setToAlignCoordSys(origin, xDir, yDir, zDir,
AcGePoint3d::kOrigin, AcGeVector3d::kXAxis,
AcGeVector3d::kYAxis, AcGeVector3d::kZAxis);
}
else
{
ASSERT(0);
m = AcGeMatrix3d::kIdentity;
}
}
Acad::ErrorStatus cloneAndXformObjects(AcDbDatabase* db, AcDbObjectIdArray entsToClone,const AcDbObjectId& ownerBlockId,
const AcGeMatrix3d& xformMat)
{
ASSERT(db != NULL);
AcDbIdMapping idMap;
Acad::ErrorStatus es = db->deepCloneObjects(
const_cast(entsToClone),
const_cast(ownerBlockId), idMap);
if (es != Acad::eOk)
{
return es;
}
AcDbEntity* clonedEnt;
AcDbIdPair idPair;
AcDbIdMappingIter iter(idMap);
for (iter.start(); !iter.done(); iter.next())
{
if (!iter.getMap(idPair)) return Acad::eInvalidInput;
if (idPair.isCloned())
{
es = acdbOpenAcDbEntity(clonedEnt, idPair.value(), AcDb::kForWrite);
if (es == Acad::eOk)
{
if (idPair.isPrimary())
{
clonedEnt->transformBy(xformMat);
}
clonedEnt->close();
}
}
}
return Acad::eOk;
}
Acad::ErrorStatus defineNewAnonymousBlock(AcDbBlockTableRecord*& newBlkRec,AcDbObjectId& newBlkRecId, AcDbDatabase* db)
{
ASSERT(db != NULL);
AcDbBlockTable* blkTbl;
Acad::ErrorStatus es = db->getSymbolTable(blkTbl, AcDb::kForWrite);
if (es != Acad::eOk) return es;
newBlkRec = new AcDbBlockTableRecord;
newBlkRec->setPathName("");
es = newBlkRec->setName(_T("*U"));
if (es == Acad::eOk) es = blkTbl->add(newBlkRecId, newBlkRec);
if (es != Acad::eOk)
{
delete newBlkRec;
newBlkRec = NULL;
}
blkTbl->close();
return es;
}
AcDbObjectId fdm_MakeBlock(CString BlockName,AcDbObjectIdArray EntIdArray,const AcGePoint3d &BasePt,double angle,const AcGeScale3d &scale)
{
AcDbObjectId newBlkRecId;
AcDbBlockTableRecord* newBlkRec;
if (defineNewAnonymousBlock(newBlkRec, newBlkRecId, acdbHostApplicationServices()->workingDatabase()) == Acad::eOk)
{
newBlkRec->setName(BlockName);
newBlkRec->setOrigin(AcGePoint3d::kOrigin);
newBlkRec->close();
AcGeMatrix3d matrix;
getUcsToWcsOriginMatrix(matrix,BasePt,acdbCurDwg(),angle);
if (cloneAndXformObjects(acdbHostApplicationServices()->workingDatabase(), EntIdArray, newBlkRecId, matrix) == Acad::eOk)
{
AcDbObjectId ReferenceId=AcDbObjectId::kNull;
AcDbBlockReference *pReference=new AcDbBlockReference;
pReference->setBlockTableRecord(newBlkRecId);
pReference->setPosition(BasePt);
pReference->setRotation(angle);
pReference->setScaleFactors(scale);
if(fdm_addToModelSpace(ReferenceId,pReference)==Acad::eOk)
{
EraseEntity(EntIdArray);
pReference->close();
return ReferenceId;
}
}
}
return AcDbObjectId::kNull;
}
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